Danielle Spencer, the former child star who played Dee Thomas on the 1970s sitcom What’s Happening!!, has died at the age of 60. Her career spanned acting and veterinary medicine, and she became a familiar face to audiences for her sharp wit and memorable catchphrase.

Child star Danielle Spencer, who portrayed Dee Thomas on the 1970s comedy TV series “What’s Happening!!,” has died at 60, according to former co-star and friend Haywood Nelson.

Former child star Danielle Spencer, who brought sass as little sis Dee in the 1970s sitcom 'What's Happening!!,' died Monday after battling cancer. She was 60.